Hinged ventilator of the hopper type



April 4, 1939. J. YMARCHBANK 2,153,508

HINGED VENTILATOR OF THE HOPPER TYPE Filed Feb. 2, 1957 Patented Apr. 4,1939 UNITED STATES PATENT OFFICE 2,153,508 HINGED VENTILATOR OF THEHOPPER TYPE Application February 2, 1937, Serial No. 123,667 In GreatBritain March 9, 1936 1 Claim.

This invention relates to improvements in hinged ventilators of thehop-per type which includes a ventilator sash having its lowerhorizontal rail hinged to the bottom rail of a ventilator frame so as toswing open on a horizontal axis into the apartment, collapsible sidecheeks or wings being provided to close the space, when the sash isopen, between the side rails of the sash and frame.

When the sash is open the side cheeks or wings and the sash present ahopper-like assembly.

Fig. 1 of the accompanying drawing is a transverse sectional elevationof a ventilator of the hopper type constructed according to an embodi-15 ment of the invention, the ventilator sash being shown open with theside cheeks extended. Fig.

2 is a fragmentary sectional plan of an end of the hopper assembly, theventilator being shown closed with the side cheeks collapsed. 20 Theembodiment of the invention illustrated includes a ventilator sash l anda ventilator frame 2. The lower rail of the sash is hinged or pivoted tothe bottom rail of the frame and collapsible side cheeks or wings areprovided to close the space, when the sash is open, between the siderails of the sash and side cheeks presenting a hopper assembly.

Each collapsible side cheek of the hopper assembly includes an'outer orend blade 3 secured to the frame 2, an inner or end blade 4 secured tothe sash I and intermediate blades 5 all strung upon the same pivot pin6 which is located in alignment with the hinge or pivot pins of the 35sash. Alternatively the pins 6 may form the sash pivots or hinge.

The blades, 3, land 5 are operatively connected by pins and cooperativeslots so that when the sash is open or closed the intermediate and innerblades are moved in succession to an extended or collapsed position.

The outer or end blade 3 and the intermediate blades 5 are each providedwith a pin 1 having a head 8. The inneror end blade 4 and the inter- 5mediate blades 5 are each provided with a slot 9 which cooperates withan associated pin 1. The intermediate blades 5, except the bladeadjacent to the outer blade 3, are each provided with a slot I0 havingan open end.

When the sash is closed each pin head 8 is housed in an associated slotl0 whereby the blades may be nested close together.

I claim:

In a hopper ventilator, in combination, a stationary rectangular frame,a movable rectangular sash pivotally mounted in said frame, a pair ofassociated end blades which project forwardly on the opening side of thesash and are rigidly secured respectively to the frame and to the sashat each side thereof, a plurality of flat intermediate blades interposedbetween the blades of each associated pair of blades, the pairs ofassociated end blades and intermediate blades constituting projectingside cheeks of the hopper ventilator, a pivot pin for each side cheek,blade entraining pins each of which is secured to an intermediate blade,a similar blade entraining pin secured to one end blade at each side ofthe frame and sash, a close-ended slot formed in each intermediateblade, a similar close-ended slot formed in the other end blade at eachside of the frame and sash, each blade entraining pin being operative ina close-endedslot, a head presented by each pin, and an additional slothaving an open end formed in the blade adjacent to each head, each ofsaid heads being operative in one of said additional slots.

JOHN MARCHBAN'K.

